[tex]^{x^2}\leq 1/4\rightarrow ^{x^2}/4+1/4\leq 1/4\cdot 1/4+1/4\rightarrow (^{x^2}+1)/4\leq 5/16. Dấu = xảy ra khi x=1/2 \rightarrow Min là 5/16[/tex]
[tex]^{x^2}\leq 1/4\rightarrow ^{x^2}/4+1/4\leq 1/4\cdot 1/4+1/4\rightarrow (^{x^2}+1)/4\leq 5/16. Dấu = xảy ra khi x=1/2 \rightarrow Min là 5/16[/tex]
[tex]^{x^2}\leq 1/4\rightarrow ^{x^2}/4+1/4\leq 1/4\cdot 1/4+1/4\rightarrow (^{x^2}+1)/4\leq 5/16. Dấu = xảy ra khi x=1/2 \rightarrow Min là 5/16[/tex]